We can confirm that a small number of postboxes in the Tooting area were sealed after a set of collection keys went missing.
The boxes were cleared of mail before they were sealed so no items were left inside them.
Royal Mail apologises to its customers in Tooting for any inconvenience this may have caused.
We are working to change the locks and reopen the boxes as quickly as possible. In the meantime, customers can use other postboxes in the area or of course drop their mail off at any Post Office branch.
The Health Secretary, Jeremy Hunt, has introduced new standards to ensure that NHS patients get nutritious and appetising food while in hospital.
It comes after an inquest revealed that a 22-year-old died from dehydration at St George's Hospital in Tooting due to neglect by medical staff. Kane Gorny from Balham was so desperate for a drink, while being treated there in 2009, that he called 999 from his hospital bed.
The new standards state that: "All patients should have access to fresh drinking water at all times, unless it contradicts clinical advice."
Mr Hunt also said that food and drink should be available at all times of the day - not just meal times.
Police investigating the finding of human remains in Tooting Bec Common say their main concern at this point is finding the parents of the child.
The partial remains of a newborn baby were found in a council depot on Monday, and police are still trying to trace its mother.
DCI Dunne said:
"The focus right now is to identify the parents, particularly the mother, because she or they are almost certainly going to be in need of some of the care services support. We're very focused on trying to identify the mother of this child.
"We have contacted educational establishments and health trusts to ask if they have any concerns about young people who may have been due to give birth around that time."
DNA tests are being carried out on the remains but it will be some time before they yield any results.
Appealing for anyone with information to come forward, DCI Dunne said:
"Allow a few moments to ask yourselves 'do I know anyone who was due to give birth or at the end of their pregnancy term and have I seen that mother or parents since then?'
"Anyone who does contact us, their details will not be revealed to any other party and our inquiries will be discreet. At this stage our main focus is making sure the parents, particularly the mother, are physically okay."
Detective Chief Inspector Mark Dunne said he would be "very surprised" if the remains, the child's legs, were deliberately left where they were found. Instead, they are exploring the possibility of them being moved by "animal activity".
A post-mortem has failed to find a cause of death for a baby whose remains were found on Tooting Bec Common.
The remains were discovered on Monday morning and police are continuing to search the common for other body parts. They believe that the baby was probably born in the last two weeks. Detectives have asked anyone with information to get in touch.